An urban stormwater runoff discharges a flow of 2 mgd containing 10 mg/l of solids into a river that is flowing at 50 cubic feet per second (cfs) and contains 5 mg/l solids. conduct a non-reactive mass balance to determine the solids concentration in mg/l, downstream of the point of stormwater discharge. show a proper schematic and the mass balance equation you used.

i just calculated it all out, and not including weekends, and all the different days off. as of this school year (2018-2019) students are spending 2198 hours in school this year

the answer is c

tell me if wrong

the correct answer would be b. amelia, because the particals of gas move really fast (charged particals) and gas also has a lot of room (particals move independently) so the only answer that has both of those is amelia's.